| 摘要 |
PURPOSE: An ink jet print apparatus, a printing method, a program and a storage medium are provided to realize the printing of high quality without reducing the whole printing speed by discriminating the possibility of irregular colors and selectively using a bidirectional printing and a unidirectional printing. CONSTITUTION: A print apparatus that, without significantly reducing an overall printing speed, allows a reduction in uneven densities due to the discharge time difference between black ink and color inks, which occur particularly at both ends in a scanning range and which are caused by the printing by bidirectional scanning of print heads, and enables high image-quality printing to be realized. One band is divided into plural areas in a main scanning direction, the dot numbers of black ink and color ink imparted to respective areas are counted. If the dot numbers of both black and color exceed respective threshold values, the area number is counted, and if the number exceeds a predetermined number, the print mode is switched from bidirectional printing to a unidirectional one, upon determining that there is a high probability of occurrence of the above-described uneven densities.
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